Machine for curving electrotypes.



w. W. MGGARROLL. MACHINE FOR OUBVING ELEGTROTYPES.

-A.PPLIOATIOH PILE'D NOV. 22, 1909.

974,288. Patenbed Nov. 1,1910. I

WALKER W. MCCARROLL, OF ARLINGTON, NEW JERSEY.

MACHINE FOR CURVING ELECTROTYPES.

Specification of Letters Patent.

Patented Nov. 1, 1910.

Application filed November 22, 1909. Serial No. 529,247.

To all whom it may concern:

Be it known that I, WALKER W. MCCAR- now, a citizen of the UnitedStates, residing in Arlington, county of Hudson, and State of NewJersey, have invented an Improvement in Machines for CurvingElectrotypes, of which the fouowlng is a specification.

This invention relates to improvements in machines for curvingelectrotypes or other printers plates and has particular reference to amachine adapted to perform this work 1n one operation.

One object is to make the machine very simple and strong; still anotherobject is to make all the parts of the machine accessible and to providefor the necessary adjustments.

Other objects will appear as the specification proceeds.

To this end the invention is embodied in a machine as set forth in thefollowing speci fication and illustrated in the accompanying drawing inwhich:

Figure l is a perspective view of a plate curving machine embodying myinvention. Fig. 2 is a longitudinal section through the machine showingthe same ready to do the work. Fig. 3 is a view similar to Fig. 2showing the work completed, and Fig. 1 shows a modification.

Referring to the three first figures the numeral 5 denotes a bed or basehaving feet 6 and provided with the two shoulders or steps 7 and 8. Atthe one end there is an upright portion or wall 9 and on either side ofthe bed there is an overhang forming guides 10 10. On each side there isfastened to the bed a rack 11, 11 which may be screwed on or fastenedotherwise.

12 represents a cylinder or roller which may be solid as shown or whichmay be lightened in large size machines. This roller is journaled inbearings 13, 13 provided with flanges 14, which grip and cooperate withthe guides 10. Inside each bearing the roller carries a gear 15, 15meshing with the racks 11. To one side there is provided handles 16 formanually turning the roller and rolling the gears 15 on the racks 11.

One or more blankets 17 of sheet steel or like material is fastened tothe roller by screws 18. A spacer 19 is inserted between the cylinderand the blanket and outside the latter is laid a cover plate 20 which iswider than the spacer 19 and projects beyond this latter to the one sideas shown at 21. The

other end of the blanket is fastened between strips 22, 22 and throughthe three layers thus formed pass bolts 23. Tension bolts 24 passloosely through the upright wall 9 and the inner ends of the said boltsgrip around the bolts 23 as shown while the outer ends are threaded andprovided with nuts and lock nuts 25 and 26. Springs 27 are coiled aroundthe bolts 24: between the bed and the nuts 25. At the opposite end stopsare provided by the nuts and lock nuts 28 and 29 on bolts or studs 30. p

The operation is as follows: Normally the parts assume the positionshown in Fig. 2 where the roller 12 is at the end of its forwardmovement, the bearings 13 abutting the stops 28 or nearly so. The plate20 is lying against the shoulder 7 so that the sheet 17 is lying flat onthe bed 5, while there is.

a slight clearance between the strips 22 and the shoulder 8.

When it is desired to curve an electrotype or similar plate 31, the sameis laid on the sheet 17 and up against the spacer 19 as shown in Fig. 1.Next the roller 12 is rotated rearward or to the right until it reachesthe position shown in Fig. 2 in which it is seen that the plate 31 iscurved around the roller and held against the same by the flexible sheet17. Next the roller is rotated to the left and the plate 31 is readilydetached in curved form and ready for use on the plate cylinder of apress or other machine.

In order that the machine shall work perfectly and easily the curving ispreferably done under tension which in this instance is furnished by thesprings 27 against the pull of which the roller 12 is drawn as the plate31- :is being curved. Hence when the operator commences to roll thecylinder there is a slight pull on the sheet against the springs 27. Theoverhang 21 on the cover 20 prevents the inner edge of the plate fromdenting the sheet as seen in Fig. 3.

In some instances it may be desirable to completely lock the sheetagainst longitudinal movement on the plates or to limit the pull of thesprings 27 without disturbing the adjustment of the said springs. Thismay be accomplished by means of the bolts and nuts 32 and 33, shown inFig. 1. By tightening up on these nuts the bolts pull the sheet close upagainst the upright 9 as is easily understood from the drawmg.

In Fig. 1 I have illustrated another tension means for keeping the plate31 against the cylinder 12. In this figure 34 represents a rubber orother elastic sheet laid to the one side of the steel sheet 17 and of alength less than that of the steel sheet. Both sheets are fastened tothe base by bolts 35. When the roller is rotated the sheets are Wound uptogether. This stretches the rubber sheet to press firmly againstthesteel sheet and the plate 81.

The above is thought to fully illustrate my invention Which has provenvery successful. I claim all such changes as properly come Within thespirit and scope of the claims.

Therefore I claim:

1. In a machine of the class described the combination of a fixedsupport, a flexible member mounted to lie flat on said support, tensionmembers interposed between the latter and the said flexible member and arotating member for curving the said flexible member. p

2. In a machine of the class described the combination of a rotatablemember, a flexible member fastenedto the same and adapted to curvearound said rotatable member When the latter is rotated and tensionmeans fastened to the opposite end of said flexible member.

3. In a machine of the class described the combination of a bed, acylinder movable on the same, blankets the one end of Which are fast tosaid cylinder and tension members interposed between the other ends ofsaid blankets and the said bed.

4. In a machine of the class described the combination of a cylinder, abed, a blanket on the latter and fast to said cylinder at the one end,yielding means for fastening the other end of said blanket to the bedand mechanism for operating the said cylinder on the bed to curve theblanket around the same.

5. In a machine of the class described the combination of a bed, a rackfastened at either side thereof, guides on said bed, .a cylinder, gearson the same for meshing With the said racks, bearings for the saidcylinder, means for guiding the same on the said guides, a blanketfastened to the said cylinder and adapted to be curved around the sameand yielding means interposed between said blanket and said bed.

6. In a machine of the class described the combination of a bed,blankets laid on the same, yielding means interposed between the bed andthe blankets and means for curving the latter against the tension of thesaid yielding means Which latter are fastened to the said bed and thesaid curving means.

7 In a machine of the class described the combination of a bed, acylinder, a flexible blanket, an elastic blanket, both of the saidblanket-s being adapted to be Wrapped around the said cylinder theelastic blanket being outside of the metal blanket the one end of thesaid blanket being fastened to the cylinder, the other end to the saidbed and means for operating the said cylinder.

WALKER W. M CARROLL.

IVitnesses:

CHARLES P. ROBINSON, ANNA E. MINIoUs.

